Why stick with this weird format instead of some responsive grid/flex design? Why only limit to two slide pages? It seems like you guys reinventing wheel here and burdening yourself with unecessary restrictions.
I swear the first person to adapt hugo/lektor/pelican for casual mobile markets will strike gold. It's a static website that you can charge like 2$/month and still have a 90% profit margin.
Sorry if I come out negative but Milkshake looks a bit of a wasted opportunity here.